The ELKA X Series is inspired by a flight instrument created by Heuer for the defunct Elka Watch. The watch case is the same as for the ELKA D Series, whose shape is taken from that of a pocket watch. 2 models, but 2 different characters. The Elka X Serie is the sporty version, equipped with cut-edge rough leather straps or Nato straps.  5 dials, a black one with numbers and hands equipped with Superluminova that looks like burnt tritium, another version with a dark blue dial and white Superluminova and a beige version that remains the color of a pocket watch made by the former brand - and 2 other models in khaki green and another in a colour gradient from beige to black.